Pentosan to help horse with Shivers??

My 17.2 hh DW/TB '97 gelding ex-jumper has Shivers and I was wondering if anyone has heard of Pentosan helping alleviate soreness from Shivers? Sometimes he seems fine, but if he gets stressed his Shivers seems to really become noticeable. He also was used a lot before I bought him and has some basic joint aches and pains. Any thoughts as to using Pentosan to help? Do you think it would be worth a try??